This is a westbound Norfolk Southern Railway freight train in the late morning of 10 May 2016 at Horseshoe Curve, west of Altoona, Pennsylvania, USA. The lead unit is NS # 9693, a General Electric CW40-9.
The rocks in the Horseshoe Curve railroad cut (Kittanning Point; Kittanning Mountain) are fluvial sandstones of the Rockwell Formation (Famennian Stage to Kinderhookian Stage, upper Upper Devonian to lower Lower Mississippian).
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